Variable-throw mechanism for automatic machines.



R. T.- GULLIFORD. VARIABLE THROW MECHANISM FOR AUTOMATIC MACHINES.APPLICATION FILED APR.16,-1910.

1,025,976. Patented May 14, 1912.

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INVEN TOR.

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COLUMBIA PLANOCIRAPH co., WASHINGTON. D. c

R. T. GULLIFORD.

APPLICATION FILED APR. 16, 1910.

Patented May 14, 1912.

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ROY T. G ULLIHJRDn 4AM ATTYS VARIABLE THROW MECHANISM FOR AUTOMATICMACHINES.

governs the position of the parts.

UNITED STATES PATENT OFFICE.

ROY T. GULLIFORD, OF WEST NOTTINGHAM, OHIO.

VARIABLE-THROW MECHANISM FOR AUTOMATIC MACHINES.

To all whom it may concern:

Be it known that I, ROY T. GULLIFORD, citizen of the United States,residing at West Nottingham, in the county of Guyahoga and State ofOhio, have invented certain new and useful Improvements inVariable-Throw Mechanism for Automatic Machines, of which the followingis a specification.

My invention relates to variable throw mechanism for automatic machines,all substantially as shown and described and particularly pointed out inthe claims.

In the accompanying drawings, Figure 1 is a side elevation or a machineembodying my invention. Fig. 2 is an enlarged elevation of a portion ofthe cam drum and a lever adapted to produce the variable movements forwhich the invent-ion is intended. Fig. 3 is a cross section of the saiddrum and lever and other parts shown in Fig. 2 and taken on the line ofthe screw which Fig. 4:

is a sectional view of the collar on the axis of the spindle, and Fig. 5is a cross section of the collar and spindle on line :1000, Fig. l.

The idea of employing an operating spindle or shaft with a workholderupon one end thereof to be moved or reciprocated axially toward and fromthe tool or tools adapted to engage the Work is not claimed to be new atthis time and machines embodying this idea in one form or another arewell known, especially such as make change of working position byinterchange of drums having cams adapted to produce or afford differentranges or throw of the spindle according to the cam range on theparticular drum used.

According to my invention the same result is obtained by means of asingle drum permanently mounted in the machine and certain novel partsinterposed between the drum and. the work holding spindle and adapted bya simple and easy movement to control the working of the toolholder inrelation to the tool or tools, not shown herein.

Now, referring to the drawings, S represents a spindle 0r shaft having awork holder W mounted on its end and the said spindle itself issupported in suitable bearings in the machine in which it has limitedaxial movement or reciprocation as the work requires.

D represents the cam drum mounted on a Specification of Letters Patent.

Application filed April 16, 1910.

Patented May 14, 1912. Serial No. 555,970.

shaft E and adapted to be rotated by any suitable means at apredetermined speed and carrying a cam rib or ribs or their equivalent,such as a cam groove or channel or the like, and so disposed on the drumas to produce the desired effect upon the spindle S through lever L andthe parts associated therewith. In the present case the drum carries twodetached or separate cams or cam ribs a? and d disposed relatively andshaped respectively as seen chiefly in' Fig. 2. The rib d at its initialportion is constructed with such an angle to the direction of rotationor to shaft E as to cause an especially quick action while the otherpart is much less inclined, and the distance of its throw of lever L isshown as from full lines to dotted lines, Fig. 2. The arrows a2 and gshow the direction of travel. Now, having the lever L moved to positionas in dotted lines, Fig. 2, it comes within the path of cam cl to beengaged by the initial end of said cam relatively as seen in Fig. 1where cam d is shown as overlapping the extremity of cam d. As thisoccurs the said cam or rib strikes the roller 7 on the bottom and end oflever L, and in its travel carries the lever back to starting positionrelatively as seen in full lines Fig. 2, and in the path of said rib orcam d. The said lever L is provided with a longitudinal slot 6 and ispivoted at its inner end by pivot pin 9 on the main frame between drum Dand collar 0 on spindle or shaft S. The said collar is mounted orsleeved upon shaft S but otherwise is independent thereof and is fixedin respect to the body or frame F of the machine between splitrings R atits sides which, in this instance, are clamped upon spindle S byclamping nuts N of ring shape. The surface of ring R is outwardlyinclined between its inner flange 12 and its thread, and a ring let witha like inner inclined surface is adapted to said incline-d portion andassists in compressing locking ring R on the shaft when nut N istightened. These or any other suitable means for fixing rings R inworking position maybe adopted.

The axial stroke or throw of spindle or shaft S is adapted to be variedwithin the limits of slot 6, in lever L and the maximum movementbringsslide or roller 5 into the outer end of said slot while the minimummovement brings the said part 5 into the inner end of said slot. Theposition of said slide may be anywhere between these ex tremes and isgoverned by nut 3 in collar G which has a stem 4 depending therefrom onwhich slide or roller5 is loosely mounted. The said nut is shaped asseen in Fig. 4: and adapted to slide transversely in a correspondinglyshaped groove or channel at the bottom of collar C and has a threadedhole through which adjusting screw 2 e11- gages. Said screw is adaptedto be turned but has no axial movement and it carries nut 3 across insaid channel according to the throw wanted for shaft or spindle S.Obviously with said slide 5 at the inner end of slot 6 the movement ofshaft or spindle S will be at the minimum even though lever L has itsaccustomed movement by the respective cams d and d, and collar Ccommunicates the throw, whether it be more or less, to spindle S. Tothis end said collar is movable axially with the spindle but is lockedagainst rotation by its flange 16 and shoulder 17 bearing against themain frame F, or by any equivalent means.

Now, referring to Figs. 4 and 5, it will be noticed also that the guideway and support for nut 3 beneath the flattened bottom surface of collarC is formed in two parallel side pieces, rabbeted on corresponding inneredges to support the side wings of the nut thereon and secured at theirends to the collar ,by through bolts 21. Dowel pins or plugs 24 may alsobe used. hen the nut 3 has been adjusted to any desired position it islocked by tightening said screws 21, and said screws are loosened Whenadjustment is to be made. This provides for take up in lost motionoccasioned by wear and strain upon the nut.

In some types of machine, a reciprocable shaft or carriage is used tooperate the tool holders instead of the work holders, and obviously myimproved device is as applicable to one as to the other, and the claimsare so to be construed.

What I claim is:

1, A reciprocable spindle and a cam drum in parallel relation side byside, in combination with a collar on said spindle and a transverselyadjustable nut next beneath the same and supported therefrom and havinga stem, and a slotted lever into which said stem extends provided with aprojection on its under side engaging said cam drum.

2. In a machine as described, a reciprocable spindle, a collar sleevedon said spindle, means to fix said collar in different set positionslongitudinally of said spindle, a nut carried by said collar having astem, means to adjust said nut transversely beneath said collar, aslotted lever engaging said stem and pivotally mounted to oscillatetransversely beneath the spindle and its collar, and a cam drum tooperate said lever and thercthrough the spindle.

3. In a machine substantially as described, a reciprocable spindle andmeans to impart a longitudinal movement thereto comprising a lever, acollar fixed on said spindle and a nut and a screw to provide a variablethrow for said spindle having operating connection with said collar andclamping means adapted to fix said nut in any adjusted position thereon,in combination with a rotatable drum having a cam groove and a roller onthe bottom of said lever engaged in said cam groove.

4. In a machine substantially as described, a reciprocable spindle andmeans to impart a longitudinal movement thereto comprising a lever, acollar fixed on said spindle and a nut and a screw therewith adapted toprovide a variable throw for said spindle and clamping means adapted tofix said nut in any adjusted position thereon comprisil'ig bolts throughsaid collar, in combination with a cam drum parallel to said spindle andhaving a channel in which said lever is operatively engaged.

5. In a machine substantially as described, a reciprocable spindlehaving a collar thereon and a screw mounted transversely thereon, atransversely adjustable nut adapted to travel on said screw and having astem and a roller on the stem, clamping plates and bolts adapted to locksaid nut upon said collar when adjusted, a lever for operating saidspindle having a slot in which said roller is operatively engaged and acam drum operatively engaging the free end of said lever.

In testimony whereof I aflix my signature in presence of two witnesses.

ROY T. GULLIFORID.

Vitnesses:

15. M. Flsrmn, F. G. MUSSUN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

